[Usage]: Suitable for fastening insulation bubble wraps, film and shading nets, screens to aluminium greenhouse grooved tracks. [Insulation Shading]: Fit for fixing bubble wrap in the winter and sunshade in the summer. [Plant Vine Support]: Used to attaching strings for vines climbing. The hole is 4mm/0.16inch in diameter. [Clip Extender]: Extension length is 3.2mm/1.3inch, particularly effective for insulation and works perfectly with shading too. [Easy to Use]: Simply insert into the roof channel of greenhouse and twist. Type Greenhouse Clips Material Plastic Colour Green Brand Unbranded/Generic MPN W2D14608784660 EAN 0614608784660 Brand Unbranded/Generic MPN W2D14608784660 .